﻿﻿Propagation Speed, Time & Wavelength

Propagation is defined as the movement of waves across the medium defined within the limits for the nature of wave. The propagation speed varies accordingly depending upon the various characteristics of the medium and waves.For instance, the electromagnetic wave, the mechanism of propagation involves mutual generation of periodically varying electric and magnetic fields and is far more difficult to understand than sound.

Wave Propagation Speed of a transmission medium is the speed at which a wavefront passes through the medium, relative to the speed of light. For optical signals, the velocity factor is the reciprocal of the refractive index.

Time T of a wave, is the time that elapses between the arrival of two consecutive crests (or troughs) at a certain location X. This definition is identical with the statement that the period is the time the vibration at X takes to complete a full cycle from crest to trough to crest. The period of a wave is given in seconds.

Wavelength λ, is a measure of the distance between repetitions of a shape feature such as peaks, valleys, or zero-crossings, not a measure of how far any given particle moves.

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